I had a Christmas tree that sounds like the one you're describing. I think it was called magic tree toy or something like that. It was about 2 feet tall with a plastic star on top that would light up. 2 hidden hinged doors opened in the front of the tree in response to light passing by a small detector on the front of the tree. The inside had a winter scene with falling snow and a moving train. Jingle bells would play through once and the doors would close and the light would go off. I think it took 3 D batteries. It was made in China. Is this the one you mean? My 89 year old mother bought it for me, probably from QVC years ago. My husband and I moved 3 months ago. We just noticed the tree was missing and are sick about it. I called QVC but they weren't able to find any info on it. I've searched online without any luck. If anyone has any info about a similar tree please share. Thanks